Doctor Andrew Paul Feinberg

BALTIMORE, MD - JANUARY 17: Andrew Paul Feinberg, M.D., M.P.H., photographed at Johns Hopkins University School of Medicine Center for Epigenetics in Baltimore, Maryland on January, 17, 2017. A trend in mid-career professional is to return to school and move into a new field and or career that is often unrelated to the previous years work. For example, if a doctor became interested in pursuing an engineering degree because of ideas about biomedical devices, how would he or she overcome his or her lack of academic credentials in engineering in order to be accepted into a graduate program. Dr. Andrew Feinberg is an example of someone who went back to school and enrolled in undergraduate classes a year or so ago and took all the exams. (Photo by Marvin Joseph/The Washington Post via Getty Images)